Lefagy a program amikor a fstream-hez ér. Miért? C++

#include <iostream>

#include <time.h>

#include <fstream>

#include <string>

using namespace std;

string name;

string namef()

{

cin>>name;

cout<<name<<" Good luck!";

}

int win()

{

cout<<"MEGALLTAL!";

ofstream score;

score.open ("score.txt");

score << name << " Won a game.\n";

score.close();

return 0;

}

int main()

{

namef();

win();

}